SYSTEM FOR THE DETECTION OF CARDIAC EVENTS

• US 20080058660A1
• Filed: 10/30/2007
• Published: 03/06/2008
• Est. Priority Date: 09/20/2002
• Status: Abandoned Application

• Current Assignee: Angel Medical Systems, Inc.
• Original Assignee: Angel Medical Systems, Inc.
• Inventors: Johnson, Steven, Harwood, Johnathan, Fischell, David, Fischell, Tim, Fischell, Robert
• Application Number:
  US11/930,050
• Publication Number:
  US 20080058660A1
• Time in Patent Office: Days
• US Class Current: 600/509
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• CPC Class Codes: A61B 5/287 Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/364 Detecting abnormal ECG interval, e.g. extrasystoles, ectopic heartbeats
• CPC Class Codes: A61B 5/366 Detecting abnormal QRS complex, e.g. widening
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: A61B 5/7465 Arrangements for interactive communication between patient and care services, e.g. by using a telephone network telemetry of measured physiological signal A61B5/0002

Abstract

Disclosed is a system for the detection of cardiac events (a guardian system) that includes an implanted device called a cardiosaver, a physician'"'"'s programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using one or more detection algorithms, the cardiosaver can detect a change in the patient'"'"'s electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the guardian system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means). If the guardian system is put into a pacemaker, the algorithm can utilize a different analysis of the electrogram depending on whether or not the pacemaker is actually pacing the heart.

Claims

1. A system for notifying a patient that a cardiac event has been detected, the system including:

an implanted device designed to detect the cardiac event;

alarm means that actuates an internal alarm signal from the implanted device to notify the patient when the implanted device detects the cardiac event, and

an external alarm system adapted for operation by the patient, the external alarm system having two-way wireless communication to and from the implanted device, and also having an external alarm signal that is actuated when the implanted device detects the cardiac event, the external alarm system having patient operated means for turning off the internal alarm signal in the implanted device and the external alarm signal being emitted by the external alarm system.

2. A system for notifying a patient that a cardiac event has been detected, the system including:

an implanted device designed to detect the cardiac event;

alarm means that actuates an internal alarm signal from the implanted device to notify the patient when the implanted device detects the cardiac event, and

an external alarm system adapted for operation by the patient, the external alarm system having two-way wireless communication to and from the implanted device, and also having patient operated means for turning off the internal alarm signal in the implanted device.

3. A system for notifying a patient that a cardiac event has been detected, the system including:

an implanted device designed to detect the cardiac event; and

an external alarm system adapted for operation by the patient, the external alarm system having two-way wireless communication to and from the implanted device, and also having an external alarm signal that is actuated when the implanted device detects the cardiac event, the external alarm system having patient operated means for turning off the external alarm signal being emitted by the external alarm system.